LoRa-based Low Intercept Probability Noise Waveform Modulation

Abstract

A LoRa noise waveform (LoRa-NW) modulation was proposed based on LoRa and low interception probability linear frequency modulation (LFM) waveform technology, and its implementation process was demonstrated. The LoRa-NW modulation signal was formed by superimposing a uniformly distributed random initial phase with mean value on the instantaneous phase to noise Lora chirp waveform. It was analyzed that such LoRa-NW signal can still be demodulated by LoRa low-complexity receiver, which maintained the advantages of LoRa with low power consumption. The demodulation performance such as symbol error rate of LoRa-NW was discussed and simulated. The simulation results showed that LoRa-NW had obtained a lower interception probability with signal-to-noise ratio deterioration about sinc2(kµ) compared with LoRa.